Highly sensitive non-enzymatic glucose sensor based on Pt nanoparticle decorated graphene oxide hydrogel

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Highly sensitive non-enzymatic glucose sensors composed of Pt nanoparticles and a 3D graphene hydrogel (GOH) were fabricated by a one-step hydrothermal synthesis. The Pt nanoparticles acted not only as electrocatalysts to oxidize glucose but also as spacers that prevent the agglomeration of graphene sheets and increase the surface area of GOHs. The Pt/GOH glucose sensor fabricated in the presence of 15mg chloroplatinic acid (HPt) exhibited a surface area of 508m<SUP>2</SUP> g<SUP>−1</SUP> and cyclic voltammetry revealed a glucose sensitivity of 137.4μAmM<SUP>−1</SUP> cm<SUP>−2</SUP>, which is 7-fold higher than the undecorated GOH. An excess of Pt resulted in a decrease in glucose sensitivity due to the loss of surface area and electrocatalytic active area by the agglomeration of Pt particles. Pt/GOH showed good response toward real blood samples and was also not affected by ascorbic acid (AA), uric acid (UA) and dopamine (DA) which are common interfering species.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highly sensitive hybrid structured non-enzymatic glucose sensors were fabricated. </LI> <LI> 0D Pt nanoparticles increased the surface area of 3D graphene oxide networks. </LI> <LI> Large surface area and high electrocatalytic activity resulted in high glucose sensitivity. </LI> <LI> Sensors fabricated in this study exhibited excellent anti-interference characteristics. </LI> </UL> </P>